Piston-packing



(No Model.)

W. TEMPLE.

Piston Packing.

No. 241,247. Patented May10,l88|.

IlNrTED STATES PATENT OFFICE.

IVILLIAM TEMPLE, OF BELLEFONTE, PENNSYLVANIA.

PISTON-PACKING.

SPECIFICATION forming part of Letters Patent No. 241,247, dated May 10, 1881.

Application filed December 18 1880.

To all whom it may concern:

Be it known that 1, WILLIAM TEMPLE, of Bellefonte, in the county of Centre and State of Pennsylvania, have invented certain new and useful Improvementsin Piston-Packing; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure 1 is a longitudinal vertical central section of a locomotive cylinder and piston having my improvement applied. Fig. 2 is a similar section of the piston and piston-rod on an enlarged scale. Fig. 3 is a plan view of the band and springs inside the packing-rings.

The same part'is marked by the same letter ofreference wherever it occurs in the drawings.

The object of my invention is to provide a convenient and simple method of setting out the packing-rings of a piston without removing either of the cylinder-heads or followerheads, thus enabling the operation to be performed in afew moments instead of occupying hours, as in the ordinary way.

Myinvention consists in settingout the packing by means of toggles, which are operated by a rod moving in the bore of the piston-rod and controlled in longitudinal position by a key passing through slots in the piston-rod and toggle-rod and fixed in the required position by a set-screw, all as hereinafter more particularly set forth. I

In the drawings, L marks the cylinder; M, the steamchest; N, the cylindercover, and a the cylinder-head.

A is the piston, provided with the ordinary packing-rings R S, supported by band and springs T in the usual way.

B is the piston-rod, whichis bored longitudinally to receive the rod G, which loosely fits the bore D. The rod 0 is attached at the lower end to a-square steel block, E, fitting loosely (N0 model.)

the chamber F in the lower end of the pistonrod. The rod 0 has a slot cut in it for the reception of a wedge-shaped key, J passing by slots through the piston-rod B. By driving in key J the rod G'is drawn toward the upper end of the piston-rod, and draws with it the block E. To this block are pivoted a number of toggles, G, whose outer ends connect with the springs H, which press against the packing-rings.

I marks the nuts by which the springs receive their original adjustment. When the block E is drawn outward the toggles are straightened and the packing-rings are set out to any desired'degree. i

K is a set-screw, which holds the rod Gin the position to which it has been drawn by the key J.

marksthe cross-head, and P the main rod or pitman; Q, the guides, in which the crossliead slides.

Thelower side of the piston naturally wears most rapidly. To compensate for this 1 detach the piston-rod from the cross-head, turn it a half-circle, and recoupleit. This brings the upper half of the piston down to the lower side of the cylinder and equalizes the wear.

What I claim is 1. The combination, with the piston of a steam-engine, of the bored pistonrod B, adjusting-rod O, movable block E, toggles G G, springs H, packing-rings R S, key J, and setscrew K, all constructed and operating substantially as and for the purpose specified.

2. In combination with the packin g-rin gs of a steam-piston, adjustingtoggles operated from withoutthe steam-cylinder by mechanism within the piston-rod, as described.

In testimony that I claim the foregoing as my own invention I aftix my signature in presence of two witnesses.

WILLIAM TEMPLE.

Witnesses E. M. BLANOHARD, J. IRWIN HAGERMAN. 

